Seismic activity at the Soufriere Hills volcano during the night has continued at the same slightly reduced level seen during the day time. It is still dominated by the occurrence of small, repetitive hybrid earthquakes at a rate of about one per three minutes. Many rockfalls were recorded, the largest of which occurred at 21:47 on 21 April and 02:56 and 06:35 on 22 April. The event of 06:35 generated an ash cloud which drifted to the northwest, possibly depositing ash in the Richmond Hill and Fox's Bay areas. A possible moderate-sized explosion was recorded at 22:26 on 21 April. Several episodes of low amplitude broadband tremor were also recorded at the Gages seismic station.
Viewing conditions of the volcano at first light from the Observatory and Bramble Airport were generally poor because of low cloud cover. However, brief glimpses revealed that there is vigorous steam emission from the dome.
In spite of the slightly reduced level of activity at the Soufriere Hills volcano during the past several days, scientists at the MVO still view the situation with grave concern. The MVO continues to urge that visits to the evacuated zone be kept to a minimum. The Tar River, Long Ground and Whites areas are extremely dangerous, and should not be entered under any circumstances.